Difference Google Ads ( Adword) vs Facebook Ads.

Google Ads	Facebook ads.
Google ads work on keyword target oriented.	Facebook ads not work keyword oriented.
Google shows ads to customers who search product or services through particular keyword.	Facebook ads shows to all whether customers needs or not the  product / services  .
You can get many result  If you search on Google by a good keyword.	Facebook don’t show so many search result.
Google is a search engine so customer gets more benefits through Google ads.	Facebook is Social media so publisher doesn’t get more benefits compare with Google.
Most important refund policy: Google refund all the prepaid balance if you close your Adwords account.	In FB have no refund policy – FB doesn’t refund your prepaid balance which exist in your FB ad manager account.
Adword account disable or suspended – if you not abide adword policy.	Maximum Time Facebook intentionally disable or suspended your FB ads account for non refund the prepaid balances.
In Google Ads account where you can add many keywords on particular product or services.	In FB ads where you unable to add many keyword which give more revenue.
Personally I get prepaid balance refund from adwords account when adwords disable my account.	Facebook disable the ad manager account but there is no process to get refund.- many times I reports to help and report section but every FB misguided me.
You can create your own advertisement bid and budget according with your capability in Google Ads.	Here Bid option not available but daily budget limit is in Facebook ads.
You can add many ads in one ad group with your one daily budget limits.	You only use separate budget limits for every ads.
Use many ads style under one adgroup with one budget like text, Banner ads, automatic ads.	Use text ads or picture ads with separate budget.
Adword or Google ads is more potential because google adsense work on many website or apps on play store where you gets more customers because google shows automatic ads in other website according with customers searching keywords.	Customers can see the ads on facebook website only – Lots of click in Facebook is not fruit full because other website not divert your customer to your own website

Facebook Refund policy.

“I’m sorry you’re having trouble with your Facebook ad account. It’s look like you’ve contacted the incorrect team for this issue. Please fill out the form in the link below so we can make sure your request gets routed to the appropriate team:

www.facebook.com/help/contact/2026068680760273

If you’re having general problems with Facebook ads, please visit the Advertiser Help Center:

www.facebook.com/business/help

Facebook mentioned above link is not proper help link to get prepaid balance refund.

But in Adword Refund policy: 

Go to Login  > setting > Preference > Account setting> cancel your account > Get your prepaid balance within 15 days in your account.